JPH04362985A - Cleaning blade exchanging method for cleaning device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of chattering and overfolding at the time of exchanging a cleaning blade. CONSTITUTION:When the cleaning blade 2 is exchanged, a disturber brush 3 and a photosensitive body 4 are rotated in a state where the cleaning blade 2 is separated from the photosensitive body 4, toner sticking to the disturber brush 3 is stuck to the photosensitive body 4, and the photosensitive body 4 is stopped after the stuck toner passes the cleaning blade 2, to press the cleaning blade 2 on the photosensitive body 4. At this time, a new cleaning blade 2 comes into contact with the photosensitive body 4 on which the toner is stuck, so that sliding resistance is low, and the chattering and overfolding can never occur.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for replacing a cleaning blade of a cleaning device used in an image forming apparatus such as an electrophotographic copying machine or a printer.

0002

[Prior Art] After a photoconductor is uniformly charged, an electrostatic latent image is formed by imagewise exposure, the electrostatic latent image is developed into a toner image by a developing machine, and the toner image is transferred to paper by a transfer machine. Image forming apparatuses that perform transfer are known, and in this image forming apparatus, toner that has not been transferred to the paper adheres to the photoconductor as residual toner, so after the transfer, the residual toner on the photoconductor is removed by a cleaning device. They are cleaning. For example, as shown in FIG. 1, a cleaning device is known in which a cleaning blade 2 and a dastarbar brush 3 are provided in a housing 1, and the cleaning blade 2 and dastarbar brush 3 are brought into contact with a photoreceptor 4. ing.

0003

The cleaning blade 2 of this cleaning device has an elastic plate shape, and is removably attached to a mounting member 5 that is swingably supported on the housing 1, and the mounting member 5 is supported by a spring. The cleaning blade 2 is pressed against the photoreceptor 4 by swinging in one direction, and a solenoid 6 is provided to swing the mounting member 5 in the other direction to separate the cleaning blade 2 from the photoreceptor 4 under normal conditions. However, since the cleaning blade 2 is configured to be pressed against the photoreceptor 4 during the image forming cycle, when the cleaning blade 2 is replaced with a new one due to wear or deterioration, the cleaning blade 2 and the photoreceptor 4 are Moreover, since the cleaning blade 2 presses its tip against the photoconductor 4 in an oblique position from the rear side toward the front in the direction of rotation of the photoconductor 4, the rotation of the photoconductor 4 causes a large amount of sliding resistance. Chattering occurs when a bending force acts on the cleaning blade 2, causing the tip of the cleaning blade 2 to separate from and come into contact with the photoreceptor 4 in a short period of time, and foldover, where the cleaning blade 2 curves into a U-shape. may occur and have an adverse effect on the cleaning operation.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a cleaning blade replacement method for a cleaning device that can solve the above-mentioned problems.

[Means for solving the problem] Cleaning blade 2
When the cleaning blade 2 is replaced, the cleaning blade 2 is separated from the photoconductor 4 and toner is applied to the part of the photoconductor 4 that has passed through the cleaning blade 2, and then the cleaning blade 2 is brought into contact with the photoconductor 4. How to replace the device's cleaning blade.

[Operation] When the cleaning blade 2 is replaced, the new cleaning blade 2 comes into contact with the photoreceptor 4 on which toner etc. have adhered, so sliding resistance is reduced and chattering, foldover, etc. are prevented from occurring. can.

[0005]

[Embodiment] As shown in FIG. 1, the photoreceptor 4 is in the form of a belt that is stretched around a drive roller 7 and a plurality of driven rollers 8, and around it is a charger 9, an image exposure section 10, a developing device 11, The image forming apparatus is configured such that the transfer device 12 and the like are sequentially arranged, and the paper is conveyed from the paper feed mechanism 13 toward the transfer device 12.

Next, the operation of replacing the cleaning blade 2 will be explained. (2) When replacing only the cleaning blade 2 The main motor that drives the drive roller 7 is stopped, the photoreceptor 4 is stopped, and the cleaning blade 2 is separated from the photoreceptor 4 by the solenoid 6. In this state, the housing 1 is pulled out from the apparatus main body, the cleaning blade 2 is replaced, and the housing 1 is pushed into the apparatus main body. With the cleaning blade 2 separated from the photoreceptor 4 by the solenoid 6, the main motor is driven to rotate the photoreceptor 4 in the direction of the arrow. As a result, the toner and lubricant Kainer adhering to the daystar bar brush 3 adhere to the surface of the photoreceptor 4 and move toward the cleaning blade 2, and the adhered part is 20 to 30 mm away from the cleaning blade 2. Once it has passed, the main motor is stopped to stop the photoreceptor 4, the solenoid 6 is demagnetized, and the cleaning blade 2 is pressed against the photoreceptor 4. After this, the normal image forming operation is performed, but since the cleaning blade 2 is in contact with the part of the surface of the photoconductor 4 where toner or tiner has adhered, even if the cleaning blade 2 is new, the sliding resistance is small. Chattering and foldover do not occur as in the conventional case.

■-■ When replacing the cleaning blade 2 and daystar bar brush 3. In the same manner as described above, the housing 1 is pulled out from the main body of the apparatus, the cleaning blade 2 is replaced, and the daystar bar brush 3 is replaced at the same time. At this time, apply toner or Kynar to the new Daystar Bar Brush 3. After that, rotate the photoreceptor 4 in the same manner as described above to create a new day star bar brush 3.
The toner and kynar applied to the photoconductor 4 are made to adhere to the cleaning blade 2.
When the photoconductor 4 has passed 20 to 30 mm from the
to press against. After this, the normal image forming operation is performed, but since the cleaning blade 2 is in contact with the part of the surface of the photoconductor 4 where toner or tiner has adhered, even if the cleaning blade 2 is new, the sliding resistance is small. Chattering and foldover do not occur as in the conventional case.

■-■ When replacing the cleaning blade 2 and daystar bar brush 3. In the same manner as described above, the housing 1 is pulled out from the main body of the apparatus, the cleaning blade 2 is replaced, and the daystar bar brush 3 is replaced at the same time. After pushing the housing 1 into the device body,
With the cleaning blade 2 separated from the photoreceptor 4, the main motor is driven to rotate the photoreceptor, and the charger 9, image exposure 10, and developing device 11 are operated to form a solid black toner image on the photoreceptor 4. When the solid black toner image passes 20 to 30 mm from the cleaning blade 2, the photoreceptor is stopped, the solenoid 6 is demagnetized, and the cleaning blade 2 is pressed against the photoreceptor 4. Even in this case, since the cleaning blade 2 comes into contact with the toner-attached portion during the normal image forming operation, chattering and foldover can be prevented in the same way as described above. Note that the solid black toner image described above is created and the cleaning blades 2 to 2 are
Passing the distance from 0 to 30 mm is useful when only the daystar bar brush is replaced, and in this case, the photoreceptor 4 and the day star bar brush 3 are idled to replace the day star bar brush 3 before forming a solid black toner image. It is preferable to straighten the star bar brush 3 to make it fit better on the photoreceptor 4.

[0009]

Effects of the Invention: When the cleaning blade 2 is replaced, the new cleaning blade 2 comes into contact with the photoreceptor 4 on which toner etc. have adhered, so the sliding resistance is reduced and chattering, foldover, etc. are prevented from occurring. It can be prevented.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of an image forming apparatus.

[Explanation of symbols]

1 housing, 2 cleaning blade, 3
Daystar bar brush, 4 photoconductor, 9 charger, 1
0 Image exposure section, 11 Developing machine, 12 Transfer device.

Claims (1)

[Claims] 1. In an image forming apparatus in which a charger 9, an image exposure section 10, a developing device 11, a transfer device, a cleaning device, etc. are sequentially arranged around a photoconductor 4, the cleaning device is connected to a housing 1 and a photoconductor. 4, and a day star bar brush 3. When the cleaning blade 2 is replaced, the cleaning blade 2 passes through the photoreceptor 4 with the cleaning blade 2 separated from the photoreceptor 4. A cleaning blade replacement method for a cleaning device, characterized in that the cleaning blade 2 is brought into contact with the photoconductor 4 after toner or the like is applied to the photoconductor 4.